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Pen Settings

CSS Base

Vendor Prefixing

Add External Stylesheets/Pens

Any URL's added here will be added as <link>s in order, and before the CSS in the editor. If you link to another Pen, it will include the CSS from that Pen. If the preprocessor matches, it will attempt to combine them before processing.

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You're using npm packages, so we've auto-selected Babel for you here, which we require to process imports and make it all work. If you need to use a different JavaScript preprocessor, remove the packages in the npm tab.

Add External Scripts/Pens

Any URL's added here will be added as <script>s in order, and run before the JavaScript in the editor. You can use the URL of any other Pen and it will include the JavaScript from that Pen.

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Use npm Packages

We can make npm packages available for you to use in your JavaScript. We use webpack to prepare them and make them available to import. We'll also process your JavaScript with Babel.

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Code Indentation


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If active, Pens will autosave every 30 seconds after being saved once.

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If enabled, the preview panel updates automatically as you code. If disabled, use the "Run" button to update.

HTML Settings

Here you can Sed posuere consectetur est at lobortis. Donec ullamcorper nulla non metus auctor fringilla. Maecenas sed diam eget risus varius blandit sit amet non magna. Donec id elit non mi porta gravida at eget metus. Praesent commodo cursus magna, vel scelerisque nisl consectetur et.

              <!DOCTYPE html>
<html lang="en">
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <link rel="stylesheet" href="estilos.css">
    <input type="text" id="entrada">
    <input type="button" value="agrega caja" id="btnAgregar">
        <div class=" caja"> Caja 1</div>
        <div class=" caja"> Caja 2</div>
        <div class=" caja"> Caja 3</div>

    <script src="main.js"> </script>
    background: #1898C2;
    width: 200px;
    padding: 20px;
    margin: 10px;
    border-radius: 5px;
var btnAgregar = document.getElementById("btnAgregar");

/*Evento para el boton Agrega*/
btnAgregar.addEventListener('click', function(){
    var entrada = document.getElementById('entrada'); 
    var contenido = entrada.value;
    agregaCaja(contenido); // se manda llamar la funcion de agrega

function agregaCaja(texto){
    var divCaja = document.createElement('div'); // se crea el div donde se agregara la entrada
    var textoDiv = document.createTextNode(texto); // se crea el texto del div 
    var padre = document.getElementsByTagName('body'); // Obtenemis todos los elementos del body
    padre[0].appendChild(divCaja); // al body le agregamos el nuevo elemento

function prueba()
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